Groundwater pollution has become a serious environmental problem.

I saw various aquatic creatures at the aquarium.

Anthropozoonosis, or animal-derived infectious diseases, have the potential to spread between humans and animals.

He is living a life of luxury.

In organic chemistry, hippurate is known as a compound of the amino acid glycine and benzoic acid.

Yamatokoku is one of the ancient states of Japan, also written as Yamataikoku.

He crossed many mountains and rivers to meet her.

He said, 'If you want to shoot a man, first shoot his horse,' and began to solve the smaller problems first.

Please remember this old proverb, 'The friendship of a gentleman is insipid as water.'

The proverb 'If you want to shoot the general, first shoot his horse' means that to achieve a big goal, you should start with small steps.